i know the engine was running perfect untill just before the crash. it had been set up by my instructor the week before using a tachometer and the day before i had it in the air for about 4 hours of flying without a problem. i did a lot of loops, rolls and tried to do a hammerhead which was funny to see it try. i just wish i could figure out what went wrong so i can use it as a good learning experience. but even my instructor cant understand why it died the way it did